<template>
  <div class="cart">
    <h4>全部商品</h4>
    <div class="cart-main">
      <div class="cart-th">
        <div class="cart-th1">全部</div>
        <div class="cart-th2">商品</div>
        <div class="cart-th3">单价（元）</div>
        <div class="cart-th4">数量</div>
        <div class="cart-th5">小计（元）</div>
        <div class="cart-th6">操作</div>
      </div>
      <div class="cart-body">
        <ul class="cart-list" v-for="cartInfo in cartInfoList" :key="cartInfo.id">
          <li class="cart-list-con1">
            <input 
              type="checkbox" 
              name="chk_list" 
              :checked="cartInfo.isChecked === 1"
              @change="checkedSingle(cartInfo.skuId , cartInfo.isChecked === 1?0:1)"
            />
          </li>
          <li class="cart-list-con2">
            <img :src="cartInfo.imgUrl" />
            <div class="item-msg">
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            </div>
          </li>
          <li class="cart-list-con3">
            <div class="item-txt">语音升级款</div>
          </li>
          <li class="cart-list-con4">
            <span class="price">{{cartInfo.skuPrice}}</span>
          </li>
          <li class="cart-list-con5">
            <a class="mins" @click="changeCartNum(cartInfo.skuId , -1)">-</a>
            <input
              autocomplete="off"
              type="text"
              :value="cartInfo.skuNum"
              minnum="1"
              class="itxt"
              @change="changeCartNum(cartInfo.skuId , $event.target.value - cartInfo.skuNum)"
            />
            <a class="plus" @click="changeCartNum(cartInfo.skuId , 1)">+</a>
          </li>
          <li class="cart-list-con6">
            <span class="sum">{{cartInfo.skuPrice * cartInfo.skuNum}}</span>
          </li>
          <li class="cart-list-con7">
            <a class="sindelet" @click="deleteSingleCart(cartInfo.skuId)">删除</a>
            <br />
            <a href="#none">移到收藏</a>
          </li>
        </ul>
      </div>
    </div>
    <div class="cart-tool">
      <div class="select-all">
        <input class="chooseAll" type="checkbox" v-model="isAllChecked"/>
        <span>全选</span>
      </div>
      <div class="option">
        <a @click="deleteCheckedCart">删除选中的商品</a>
        <a href="#none">移到我的关注</a>
        <a href="#none">清除下柜商品</a>
      </div>
      <div class="money-box">
        <div class="chosed">已选择 <span>{{checkedAllNum}}</span>件商品</div>
        <div class="sumprice">
          <em>总价（不含运费） ：</em>
          <i class="summoney">{{checkedAllPrice}}</i>
        </div>
        <div class="sumbtn">
          <router-link class="sum-btn" to="/trade">结算</router-link>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
//引入购物车页面的所有请求
import {
  requestShopCartList,
  requestAddOrUpdateNumCart,
  requestSignleCart,
  requestSignleChecked,
  requestAllChecked,
  requestDeleteChecked
} from "@/api"  
export default {
  name: "ShopCart",
  data() {
    return {
      cartAllInfoList: []
    }
  },

  computed:{
    //1.计算出没有优惠的商品数据
    cartInfoList(){
      return this.cartAllInfoList[0]?.cartInfoList || []
    },

    //2.计算选中的商品的总数量
    checkedAllNum(){
      return this.cartInfoList.reduce((p , c) => {
        return  p +  (c.isChecked === 1 ? c.skuNum : 0)
      } , 0)
    },

    //3.计算选中的商品的总价格
    checkedAllPrice(){
      return this.cartInfoList.reduce((p , c) => {
        return p + (c.isChecked === 1 ? c.skuNum*c.skuPrice : 0)
      } , 0 )
    },

    //4.计算全选框是否选中
    isAllChecked:{
      get(){
        return this.cartInfoList.every((item) => {
          return item.isChecked === 1
        })
      },
      async set(value){
        //拿到全部商品id组成的数组
        const skuIdList  = this.cartInfoList.reduce((p , c) => {
          p.push(c.skuId)
          return p
        } , [])

        //5.发送改变全部商品状态的请求
        await requestAllChecked(value?1:0 , skuIdList)
        //重新获取购物车数据
        this.getShopCartList()

      }
    },


  },
  


  methods: {
    //1.获取购物车列表请求
    async getShopCartList(){
      const result = await requestShopCartList()
      this.cartAllInfoList = result
    },

    //2.修改商品数量函数
    async changeCartNum(skuId , skuNum){
      await requestAddOrUpdateNumCart({skuId , skuNum})
      //重新获取购物车数据
      this.getShopCartList()
    },

    //3.删除单个商品函数
    async deleteSingleCart(skuId){
      await requestSignleCart(skuId)
      //重新获取购物车数据
      this.getShopCartList()
    },

    //4.切换单个商品状态
    async checkedSingle(skuId , isChecked){
      await requestSignleChecked({skuId , isChecked})
      //重新获取购物车数据
      this.getShopCartList()
    },

    //6.删除已选中的商品
    async deleteCheckedCart(){
      //拿到已选中的商品id组成的数组
      const skuIdList = this.cartInfoList.reduce((p , c) => {
        c.isChecked === 1 ? p.push(c.skuId) : p
        return p
      } , [])

      //发送删除选中的商品的请求
      await requestDeleteChecked(skuIdList)
      //重新获取购物车数据
      this.getShopCartList()
    }


    
  },

  mounted() {
    //1.初始化请求购物车列表
    this.getShopCartList()
  },

};
</script>

<style lang="less" scoped>
.cart {
  width: 1200px;
  margin: 0 auto;

  h4 {
    margin: 9px 0;
    font-size: 14px;
    line-height: 21px;
  }

  .cart-main {
    .cart-th {
      background: #f5f5f5;
      border: 1px solid #ddd;
      padding: 10px;
      overflow: hidden;

      & > div {
        float: left;
      }

      .cart-th1 {
        width: 25%;

        input {
          vertical-align: middle;
        }

        span {
          vertical-align: middle;
        }
      }

      .cart-th2 {
        width: 25%;
      }

      .cart-th3,
      .cart-th4,
      .cart-th5,
      .cart-th6 {
        width: 12.5%;
      }
    }

    .cart-body {
      margin: 15px 0;
      border: 1px solid #ddd;

      .cart-list {
        padding: 10px;
        border-bottom: 1px solid #ddd;
        overflow: hidden;

        & > li {
          float: left;
        }

        .cart-list-con1 {
          width: 4.1667%;
        }

        .cart-list-con2 {
          width: 25%;

          img {
            width: 82px;
            height: 82px;
            float: left;
          }

          .item-msg {
            float: left;
            width: 150px;
            margin: 0 10px;
            line-height: 18px;
          }
        }

        .cart-list-con3 {
          width: 20.8333%;

          .item-txt {
            text-align: center;
          }
        }

        .cart-list-con4 {
          width: 12.5%;
        }

        .cart-list-con5 {
          width: 12.5%;

          .mins {
            border: 1px solid #ddd;
            border-right: 0;
            float: left;
            color: #666;
            width: 6px;
            text-align: center;
            padding: 8px;
          }

          input {
            border: 1px solid #ddd;
            width: 40px;
            height: 33px;
            float: left;
            text-align: center;
            font-size: 14px;
          }

          .plus {
            border: 1px solid #ddd;
            border-left: 0;
            float: left;
            color: #666;
            width: 6px;
            text-align: center;
            padding: 8px;
          }
        }

        .cart-list-con6 {
          width: 12.5%;

          .sum {
            font-size: 16px;
          }
        }

        .cart-list-con7 {
          width: 12.5%;

          a {
            color: #666;
          }
        }
      }
    }
  }

  .cart-tool {
    overflow: hidden;
    border: 1px solid #ddd;

    .select-all {
      padding: 10px;
      overflow: hidden;
      float: left;

      span {
        vertical-align: middle;
      }

      input {
        vertical-align: middle;
      }
    }

    .option {
      padding: 10px;
      overflow: hidden;
      float: left;

      a {
        float: left;
        padding: 0 10px;
        color: #666;
      }
    }

    .money-box {
      float: right;

      .chosed {
        line-height: 26px;
        float: left;
        padding: 0 10px;
      }

      .sumprice {
        width: 200px;
        line-height: 22px;
        float: left;
        padding: 0 10px;

        .summoney {
          color: #c81623;
          font-size: 16px;
        }
      }

      .sumbtn {
        float: right;

        a {
          display: block;
          position: relative;
          width: 96px;
          height: 52px;
          line-height: 52px;
          color: #fff;
          text-align: center;
          font-size: 18px;
          font-family: "Microsoft YaHei";
          background: #e1251b;
          overflow: hidden;
        }
      }
    }
  }
}
</style>